Bill,

Congrats on the baby and being proud of him!

I had a difficult time sensing motion this past winter at one thing...running a vertical mill in my shop.I would have a difficult time sensing where the motion was coming from ( was it the table, the ground outside the window behind the mill or the object I was milling moving on the table) even when I knew I was making the table move. It was strange because it was mostly limited to just that and I Haven't any clue why that and nothing else caused the confusion.

Don't have any explanation for your case, just saying heads can be goofy in unexplained ways I guess.

Bud